agp.c revision 1.10
1 /* $NetBSD: agp.c,v 1.10 2001/09/16 18:33:08 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 Doug Rabson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: src/sys/pci/agp.c,v 1.12 2001/05/19 01:28:07 alfred Exp $ 29 */ 30 31 /* 32 * Copyright (c) 2001 Wasabi Systems, Inc. 33 * All rights reserved. 34 * 35 * Written by Frank van der Linden for Wasabi Systems, Inc. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed for the NetBSD Project by 48 * Wasabi Systems, Inc. 49 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 50 * or promote products derived from this software without specific prior 51 * written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 55 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 56 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 57 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 58 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 59 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 60 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 61 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 62 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 63 * POSSIBILITY OF SUCH DAMAGE. 64 */ 65 66 67 #include <sys/param.h> 68 #include <sys/systm.h> 69 #include <sys/malloc.h> 70 #include <sys/kernel.h> 71 #include <sys/device.h> 72 #include <sys/conf.h> 73 #include <sys/ioctl.h> 74 #include <sys/fcntl.h> 75 #include <sys/agpio.h> 76 #include <sys/proc.h> 77 78 #include <uvm/uvm_extern.h> 79 80 #include <dev/pci/pcireg.h> 81 #include <dev/pci/pcivar.h> 82 #include <dev/pci/agpvar.h> 83 #include <dev/pci/agpreg.h> 84 #include <dev/pci/pcidevs.h> 85 86 #include <machine/bus.h> 87 88 /* Helper functions for implementing chipset mini drivers. */ 89 /* XXXfvdl get rid of this one. */ 90 91 extern struct cfdriver agp_cd; 92 cdev_decl(agp); 93 94 int agpmatch(struct device *, struct cfdata *, void *); 95 void agpattach(struct device *, struct device *, void *); 96 97 struct cfattach agp_ca = { 98 sizeof(struct agp_softc), agpmatch, agpattach 99 }; 100 101 static int agp_info_user(struct agp_softc *, agp_info *); 102 static int agp_setup_user(struct agp_softc *, agp_setup *); 103 static int agp_allocate_user(struct agp_softc *, agp_allocate *); 104 static int agp_deallocate_user(struct agp_softc *, int); 105 static int agp_bind_user(struct agp_softc *, agp_bind *); 106 static int agp_unbind_user(struct agp_softc *, agp_unbind *); 107 static int agpdev_match(struct pci_attach_args *); 108 109 #include "agp_ali.h" 110 #include "agp_amd.h" 111 #include "agp_i810.h" 112 #include "agp_intel.h" 113 #include "agp_sis.h" 114 #include "agp_via.h" 115 116 const struct agp_product { 117 uint32_t ap_vendor; 118 uint32_t ap_product; 119 int (*ap_match)(const struct pci_attach_args *); 120 int (*ap_attach)(struct device *, struct device *, void *); 121 } agp_products[] = { 122 #if NAGP_ALI > 0 123 { PCI_VENDOR_ALI, -1, 124 NULL, agp_ali_attach }, 125 #endif 126 127 #if NAGP_AMD > 0 128 { PCI_VENDOR_AMD, -1, 129 agp_amd_match, agp_amd_attach }, 130 #endif 131 132 #if NAGP_I810 > 0 133 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810_MCH, 134 NULL, agp_i810_attach }, 135 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810_DC100_MCH, 136 NULL, agp_i810_attach }, 137 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810E_MCH, 138 NULL, agp_i810_attach }, 139 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82815_FULL_HUB, 140 NULL, agp_i810_attach }, 141 #endif 142 143 #if NAGP_INTEL > 0 144 { PCI_VENDOR_INTEL, -1, 145 NULL, agp_intel_attach }, 146 #endif 147 148 #if NAGP_SIS > 0 149 { PCI_VENDOR_SIS, -1, 150 NULL, agp_sis_attach }, 151 #endif 152 153 #if NAGP_VIA > 0 154 { PCI_VENDOR_VIATECH, -1, 155 NULL, agp_via_attach }, 156 #endif 157 158 { 0, 0, 159 NULL, NULL }, 160 }; 161 162 static const struct agp_product * 163 agp_lookup(const struct pci_attach_args *pa) 164 { 165 const struct agp_product *ap; 166 167 /* First find the vendor. */ 168 for (ap = agp_products; ap->ap_attach != NULL; ap++) { 169 if (PCI_VENDOR(pa->pa_id) == ap->ap_vendor) 170 break; 171 } 172 173 if (ap->ap_attach == NULL) 174 return (NULL); 175 176 /* Now find the product within the vendor's domain. */ 177 for (; ap->ap_attach != NULL; ap++) { 178 if (PCI_VENDOR(pa->pa_id) != ap->ap_vendor) { 179 /* Ran out of this vendor's section of the table. */ 180 return (NULL); 181 } 182 if (ap->ap_product == PCI_PRODUCT(pa->pa_id)) { 183 /* Exact match. */ 184 break; 185 } 186 if (ap->ap_product == (uint32_t) -1) { 187 /* Wildcard match. */ 188 break; 189 } 190 } 191 192 if (ap->ap_attach == NULL) 193 return (NULL); 194 195 /* Now let the product-specific driver filter the match. */ 196 if (ap->ap_match != NULL && (*ap->ap_match)(pa) == 0) 197 return (NULL); 198 199 return (ap); 200 } 201 202 int 203 agpmatch(struct device *parent, struct cfdata *match, void *aux) 204 { 205 struct agpbus_attach_args *apa = aux; 206 struct pci_attach_args *pa = &apa->apa_pci_args; 207 208 if (strcmp(apa->apa_busname, "agp") != 0) 209 return (0); 210 211 if (agp_lookup(pa) == NULL) 212 return (0); 213 214 return (1); 215 } 216 217 static int agp_max[][2] = { 218 {0, 0}, 219 {32, 4}, 220 {64, 28}, 221 {128, 96}, 222 {256, 204}, 223 {512, 440}, 224 {1024, 942}, 225 {2048, 1920}, 226 {4096, 3932} 227 }; 228 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0])) 229 230 void 231 agpattach(struct device *parent, struct device *self, void *aux) 232 { 233 struct agpbus_attach_args *apa = aux; 234 struct pci_attach_args *pa = &apa->apa_pci_args; 235 struct agp_softc *sc = (void *)self; 236 const struct agp_product *ap; 237 int memsize, i, ret; 238 239 ap = agp_lookup(pa); 240 if (ap == NULL) { 241 printf("\n"); 242 panic("agpattach: impossible"); 243 } 244 245 sc->as_dmat = pa->pa_dmat; 246 sc->as_pc = pa->pa_pc; 247 sc->as_tag = pa->pa_tag; 248 sc->as_id = pa->pa_id; 249 250 /* 251 * Work out an upper bound for agp memory allocation. This 252 * uses a heurisitc table from the Linux driver. 253 */ 254 memsize = ptoa(physmem) >> 20; 255 for (i = 0; i < agp_max_size; i++) { 256 if (memsize <= agp_max[i][0]) 257 break; 258 } 259 if (i == agp_max_size) 260 i = agp_max_size - 1; 261 sc->as_maxmem = agp_max[i][1] << 20U; 262 263 /* 264 * The lock is used to prevent re-entry to 265 * agp_generic_bind_memory() since that function can sleep. 266 */ 267 lockinit(&sc->as_lock, PZERO|PCATCH, "agplk", 0, 0); 268 269 TAILQ_INIT(&sc->as_memory); 270 271 ret = (*ap->ap_attach)(parent, self, pa); 272 if (ret == 0) 273 printf(": aperture at 0x%lx, size 0x%lx\n", 274 (unsigned long)sc->as_apaddr, 275 (unsigned long)AGP_GET_APERTURE(sc)); 276 else 277 sc->as_chipc = NULL; 278 } 279 int 280 agp_map_aperture(struct pci_attach_args *pa, struct agp_softc *sc) 281 { 282 /* 283 * Find and map the aperture. 284 */ 285 if (pci_mapreg_map(pa, AGP_APBASE, PCI_MAPREG_TYPE_MEM, 286 BUS_SPACE_MAP_LINEAR, 287 &sc->as_apt, &sc->as_aph, &sc->as_apaddr, &sc->as_apsize) != 0) 288 return ENXIO; 289 290 return 0; 291 } 292 293 struct agp_gatt * 294 agp_alloc_gatt(struct agp_softc *sc) 295 { 296 u_int32_t apsize = AGP_GET_APERTURE(sc); 297 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 298 struct agp_gatt *gatt; 299 int dummyseg; 300 301 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); 302 if (!gatt) 303 return NULL; 304 gatt->ag_entries = entries; 305 306 if (agp_alloc_dmamem(sc->as_dmat, entries * sizeof(u_int32_t), 307 0, &gatt->ag_dmamap, (caddr_t *)&gatt->ag_virtual, 308 &gatt->ag_physical, &gatt->ag_dmaseg, 1, &dummyseg) != 0) 309 return NULL; 310 311 gatt->ag_size = entries * sizeof(u_int32_t); 312 memset(gatt->ag_virtual, 0, gatt->ag_size); 313 agp_flush_cache(); 314 315 return gatt; 316 } 317 318 void 319 agp_free_gatt(struct agp_softc *sc, struct agp_gatt *gatt) 320 { 321 agp_free_dmamem(sc->as_dmat, gatt->ag_size, gatt->ag_dmamap, 322 (caddr_t)gatt->ag_virtual, &gatt->ag_dmaseg, 1); 323 free(gatt, M_AGP); 324 } 325 326 327 int 328 agp_generic_detach(struct agp_softc *sc) 329 { 330 lockmgr(&sc->as_lock, LK_DRAIN, 0); 331 agp_flush_cache(); 332 return 0; 333 } 334 335 static int 336 agpdev_match(struct pci_attach_args *pa) 337 { 338 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && 339 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) 340 return 1; 341 342 return 0; 343 } 344 345 int 346 agp_generic_enable(struct agp_softc *sc, u_int32_t mode) 347 { 348 struct pci_attach_args pa; 349 pcireg_t tstatus, mstatus; 350 pcireg_t command; 351 int rq, sba, fw, rate, capoff; 352 353 if (pci_find_device(&pa, agpdev_match) == 0 || 354 pci_get_capability(pa.pa_pc, pa.pa_tag, PCI_CAP_AGP, 355 &capoff, NULL) == 0) { 356 printf("%s: can't find display\n", sc->as_dev.dv_xname); 357 return ENXIO; 358 } 359 360 tstatus = pci_conf_read(sc->as_pc, sc->as_tag, 361 sc->as_capoff + AGP_STATUS); 362 mstatus = pci_conf_read(pa.pa_pc, pa.pa_tag, 363 capoff + AGP_STATUS); 364 365 /* Set RQ to the min of mode, tstatus and mstatus */ 366 rq = AGP_MODE_GET_RQ(mode); 367 if (AGP_MODE_GET_RQ(tstatus) < rq) 368 rq = AGP_MODE_GET_RQ(tstatus); 369 if (AGP_MODE_GET_RQ(mstatus) < rq) 370 rq = AGP_MODE_GET_RQ(mstatus); 371 372 /* Set SBA if all three can deal with SBA */ 373 sba = (AGP_MODE_GET_SBA(tstatus) 374 & AGP_MODE_GET_SBA(mstatus) 375 & AGP_MODE_GET_SBA(mode)); 376 377 /* Similar for FW */ 378 fw = (AGP_MODE_GET_FW(tstatus) 379 & AGP_MODE_GET_FW(mstatus) 380 & AGP_MODE_GET_FW(mode)); 381 382 /* Figure out the max rate */ 383 rate = (AGP_MODE_GET_RATE(tstatus) 384 & AGP_MODE_GET_RATE(mstatus) 385 & AGP_MODE_GET_RATE(mode)); 386 if (rate & AGP_MODE_RATE_4x) 387 rate = AGP_MODE_RATE_4x; 388 else if (rate & AGP_MODE_RATE_2x) 389 rate = AGP_MODE_RATE_2x; 390 else 391 rate = AGP_MODE_RATE_1x; 392 393 /* Construct the new mode word and tell the hardware */ 394 command = AGP_MODE_SET_RQ(0, rq); 395 command = AGP_MODE_SET_SBA(command, sba); 396 command = AGP_MODE_SET_FW(command, fw); 397 command = AGP_MODE_SET_RATE(command, rate); 398 command = AGP_MODE_SET_AGP(command, 1); 399 pci_conf_write(sc->as_pc, sc->as_tag, 400 sc->as_capoff + AGP_COMMAND, command); 401 pci_conf_write(pa.pa_pc, pa.pa_tag, capoff + AGP_COMMAND, command); 402 403 return 0; 404 } 405 406 struct agp_memory * 407 agp_generic_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 408 { 409 struct agp_memory *mem; 410 411 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 412 return 0; 413 414 if (sc->as_allocated + size > sc->as_maxmem) 415 return 0; 416 417 if (type != 0) { 418 printf("agp_generic_alloc_memory: unsupported type %d\n", 419 type); 420 return 0; 421 } 422 423 mem = malloc(sizeof *mem, M_AGP, M_WAITOK); 424 if (mem == NULL) 425 return NULL; 426 427 if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1, 428 size, 0, BUS_DMA_NOWAIT, &mem->am_dmamap) != 0) { 429 free(mem, M_AGP); 430 return NULL; 431 } 432 433 mem->am_id = sc->as_nextid++; 434 mem->am_size = size; 435 mem->am_type = 0; 436 mem->am_physical = 0; 437 mem->am_offset = 0; 438 mem->am_is_bound = 0; 439 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 440 sc->as_allocated += size; 441 442 return mem; 443 } 444 445 int 446 agp_generic_free_memory(struct agp_softc *sc, struct agp_memory *mem) 447 { 448 if (mem->am_is_bound) 449 return EBUSY; 450 451 sc->as_allocated -= mem->am_size; 452 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 453 bus_dmamap_destroy(sc->as_dmat, mem->am_dmamap); 454 free(mem, M_AGP); 455 return 0; 456 } 457 458 int 459 agp_generic_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 460 off_t offset) 461 { 462 off_t i, k; 463 bus_size_t done, j; 464 int error; 465 bus_dma_segment_t *segs, *seg; 466 bus_addr_t pa; 467 int contigpages, nseg; 468 469 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0); 470 471 if (mem->am_is_bound) { 472 printf("%s: memory already bound\n", sc->as_dev.dv_xname); 473 lockmgr(&sc->as_lock, LK_RELEASE, 0); 474 return EINVAL; 475 } 476 477 if (offset < 0 478 || (offset & (AGP_PAGE_SIZE - 1)) != 0 479 || offset + mem->am_size > AGP_GET_APERTURE(sc)) { 480 printf("%s: binding memory at bad offset %#lx\n", 481 sc->as_dev.dv_xname, (unsigned long) offset); 482 lockmgr(&sc->as_lock, LK_RELEASE, 0); 483 return EINVAL; 484 } 485 486 /* 487 * XXXfvdl 488 * The memory here needs to be directly accessable from the 489 * AGP video card, so it should be allocated using bus_dma. 490 * However, it need not be contiguous, since individual pages 491 * are translated using the GATT. 492 * 493 * Using a large chunk of contiguous memory may get in the way 494 * of other subsystems that may need one, so we try to be friendly 495 * and ask for allocation in chunks of a minimum of 8 pages 496 * of contiguous memory on average, falling back to 4, 2 and 1 497 * if really needed. Larger chunks are preferred, since allocating 498 * a bus_dma_segment per page would be overkill. 499 */ 500 501 for (contigpages = 8; contigpages > 0; contigpages >>= 1) { 502 nseg = (mem->am_size / (contigpages * PAGE_SIZE)) + 1; 503 segs = malloc(nseg * sizeof *segs, M_AGP, M_WAITOK); 504 if (segs == NULL) 505 return ENOMEM; 506 if (bus_dmamem_alloc(sc->as_dmat, mem->am_size, PAGE_SIZE, 0, 507 segs, nseg, &mem->am_nseg, 508 BUS_DMA_WAITOK) != 0) { 509 free(segs, M_AGP); 510 continue; 511 } 512 if (bus_dmamem_map(sc->as_dmat, segs, mem->am_nseg, 513 mem->am_size, &mem->am_virtual, BUS_DMA_WAITOK) != 0) { 514 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 515 free(segs, M_AGP); 516 continue; 517 } 518 if (bus_dmamap_load(sc->as_dmat, mem->am_dmamap, 519 mem->am_virtual, mem->am_size, NULL, BUS_DMA_WAITOK) != 0) { 520 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 521 mem->am_size); 522 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 523 free(segs, M_AGP); 524 continue; 525 } 526 mem->am_dmaseg = segs; 527 break; 528 } 529 530 if (contigpages == 0) { 531 lockmgr(&sc->as_lock, LK_RELEASE, 0); 532 return ENOMEM; 533 } 534 535 536 /* 537 * Bind the individual pages and flush the chipset's 538 * TLB. 539 */ 540 done = 0; 541 for (i = 0; i < mem->am_dmamap->dm_nsegs; i++) { 542 seg = &mem->am_dmamap->dm_segs[i]; 543 /* 544 * Install entries in the GATT, making sure that if 545 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not 546 * aligned to PAGE_SIZE, we don't modify too many GATT 547 * entries. 548 */ 549 for (j = 0; j < seg->ds_len && (done + j) < mem->am_size; 550 j += AGP_PAGE_SIZE) { 551 pa = seg->ds_addr + j; 552 AGP_DPF("binding offset %#lx to pa %#lx\n", 553 (unsigned long)(offset + done + j), 554 (unsigned long)pa); 555 error = AGP_BIND_PAGE(sc, offset + done + j, pa); 556 if (error) { 557 /* 558 * Bail out. Reverse all the mappings 559 * and unwire the pages. 560 */ 561 for (k = 0; k < done + j; k += AGP_PAGE_SIZE) 562 AGP_UNBIND_PAGE(sc, offset + k); 563 564 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 565 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 566 mem->am_size); 567 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, 568 mem->am_nseg); 569 free(mem->am_dmaseg, M_AGP); 570 lockmgr(&sc->as_lock, LK_RELEASE, 0); 571 return error; 572 } 573 } 574 done += seg->ds_len; 575 } 576 577 /* 578 * Flush the cpu cache since we are providing a new mapping 579 * for these pages. 580 */ 581 agp_flush_cache(); 582 583 /* 584 * Make sure the chipset gets the new mappings. 585 */ 586 AGP_FLUSH_TLB(sc); 587 588 mem->am_offset = offset; 589 mem->am_is_bound = 1; 590 591 lockmgr(&sc->as_lock, LK_RELEASE, 0); 592 593 return 0; 594 } 595 596 int 597 agp_generic_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 598 { 599 int i; 600 601 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0); 602 603 if (!mem->am_is_bound) { 604 printf("%s: memory is not bound\n", sc->as_dev.dv_xname); 605 lockmgr(&sc->as_lock, LK_RELEASE, 0); 606 return EINVAL; 607 } 608 609 610 /* 611 * Unbind the individual pages and flush the chipset's 612 * TLB. Unwire the pages so they can be swapped. 613 */ 614 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 615 AGP_UNBIND_PAGE(sc, mem->am_offset + i); 616 617 agp_flush_cache(); 618 AGP_FLUSH_TLB(sc); 619 620 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 621 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, mem->am_size); 622 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, mem->am_nseg); 623 624 free(mem->am_dmaseg, M_AGP); 625 626 mem->am_offset = 0; 627 mem->am_is_bound = 0; 628 629 lockmgr(&sc->as_lock, LK_RELEASE, 0); 630 631 return 0; 632 } 633 634 /* Helper functions for implementing user/kernel api */ 635 636 static int 637 agp_acquire_helper(struct agp_softc *sc, enum agp_acquire_state state) 638 { 639 if (sc->as_state != AGP_ACQUIRE_FREE) 640 return EBUSY; 641 sc->as_state = state; 642 643 return 0; 644 } 645 646 static int 647 agp_release_helper(struct agp_softc *sc, enum agp_acquire_state state) 648 { 649 struct agp_memory *mem; 650 651 if (sc->as_state == AGP_ACQUIRE_FREE) 652 return 0; 653 654 if (sc->as_state != state) 655 return EBUSY; 656 657 /* 658 * Clear out the aperture and free any outstanding memory blocks. 659 */ 660 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 661 if (mem->am_is_bound) { 662 printf("agp_release_helper: mem %d is bound\n", 663 mem->am_id); 664 AGP_UNBIND_MEMORY(sc, mem); 665 } 666 } 667 668 sc->as_state = AGP_ACQUIRE_FREE; 669 return 0; 670 } 671 672 static struct agp_memory * 673 agp_find_memory(struct agp_softc *sc, int id) 674 { 675 struct agp_memory *mem; 676 677 AGP_DPF("searching for memory block %d\n", id); 678 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 679 AGP_DPF("considering memory block %d\n", mem->am_id); 680 if (mem->am_id == id) 681 return mem; 682 } 683 return 0; 684 } 685 686 /* Implementation of the userland ioctl api */ 687 688 static int 689 agp_info_user(struct agp_softc *sc, agp_info *info) 690 { 691 memset(info, 0, sizeof *info); 692 info->bridge_id = sc->as_id; 693 if (sc->as_capoff != 0) 694 info->agp_mode = pci_conf_read(sc->as_pc, sc->as_tag, 695 sc->as_capoff + AGP_STATUS); 696 else 697 info->agp_mode = 0; /* i810 doesn't have real AGP */ 698 info->aper_base = sc->as_apaddr; 699 info->aper_size = AGP_GET_APERTURE(sc) >> 20; 700 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT; 701 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT; 702 703 return 0; 704 } 705 706 static int 707 agp_setup_user(struct agp_softc *sc, agp_setup *setup) 708 { 709 return AGP_ENABLE(sc, setup->agp_mode); 710 } 711 712 static int 713 agp_allocate_user(struct agp_softc *sc, agp_allocate *alloc) 714 { 715 struct agp_memory *mem; 716 717 mem = AGP_ALLOC_MEMORY(sc, 718 alloc->type, 719 alloc->pg_count << AGP_PAGE_SHIFT); 720 if (mem) { 721 alloc->key = mem->am_id; 722 alloc->physical = mem->am_physical; 723 return 0; 724 } else { 725 return ENOMEM; 726 } 727 } 728 729 static int 730 agp_deallocate_user(struct agp_softc *sc, int id) 731 { 732 struct agp_memory *mem = agp_find_memory(sc, id); 733 734 if (mem) { 735 AGP_FREE_MEMORY(sc, mem); 736 return 0; 737 } else { 738 return ENOENT; 739 } 740 } 741 742 static int 743 agp_bind_user(struct agp_softc *sc, agp_bind *bind) 744 { 745 struct agp_memory *mem = agp_find_memory(sc, bind->key); 746 747 if (!mem) 748 return ENOENT; 749 750 return AGP_BIND_MEMORY(sc, mem, bind->pg_start << AGP_PAGE_SHIFT); 751 } 752 753 static int 754 agp_unbind_user(struct agp_softc *sc, agp_unbind *unbind) 755 { 756 struct agp_memory *mem = agp_find_memory(sc, unbind->key); 757 758 if (!mem) 759 return ENOENT; 760 761 return AGP_UNBIND_MEMORY(sc, mem); 762 } 763 764 int 765 agpopen(dev_t dev, int oflags, int devtype, struct proc *p) 766 { 767 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 768 769 if (sc == NULL) 770 return ENXIO; 771 772 if (sc->as_chipc == NULL) 773 return ENXIO; 774 775 if (!sc->as_isopen) 776 sc->as_isopen = 1; 777 else 778 return EBUSY; 779 780 return 0; 781 } 782 783 int 784 agpclose(dev_t dev, int fflag, int devtype, struct proc *p) 785 { 786 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 787 788 /* 789 * Clear the GATT and force release on last close 790 */ 791 if (sc->as_state == AGP_ACQUIRE_USER) 792 agp_release_helper(sc, AGP_ACQUIRE_USER); 793 sc->as_isopen = 0; 794 795 return 0; 796 } 797 798 int 799 agpioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *p) 800 { 801 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 802 803 if (sc == NULL) 804 return ENODEV; 805 806 if ((fflag & FWRITE) == 0 && cmd != AGPIOC_INFO) 807 return EPERM; 808 809 switch (cmd) { 810 case AGPIOC_INFO: 811 return agp_info_user(sc, (agp_info *) data); 812 813 case AGPIOC_ACQUIRE: 814 return agp_acquire_helper(sc, AGP_ACQUIRE_USER); 815 816 case AGPIOC_RELEASE: 817 return agp_release_helper(sc, AGP_ACQUIRE_USER); 818 819 case AGPIOC_SETUP: 820 return agp_setup_user(sc, (agp_setup *)data); 821 822 case AGPIOC_ALLOCATE: 823 return agp_allocate_user(sc, (agp_allocate *)data); 824 825 case AGPIOC_DEALLOCATE: 826 return agp_deallocate_user(sc, *(int *) data); 827 828 case AGPIOC_BIND: 829 return agp_bind_user(sc, (agp_bind *)data); 830 831 case AGPIOC_UNBIND: 832 return agp_unbind_user(sc, (agp_unbind *)data); 833 834 } 835 836 return EINVAL; 837 } 838 839 paddr_t 840 agpmmap(dev_t dev, off_t offset, int prot) 841 { 842 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 843 844 if (offset > AGP_GET_APERTURE(sc)) 845 return -1; 846 847 return (bus_space_mmap(sc->as_apt, sc->as_apaddr, offset, prot, 848 BUS_SPACE_MAP_LINEAR)); 849 } 850 851 /* Implementation of the kernel api */ 852 853 void * 854 agp_find_device(int unit) 855 { 856 return device_lookup(&agp_cd, unit); 857 } 858 859 enum agp_acquire_state 860 agp_state(void *devcookie) 861 { 862 struct agp_softc *sc = devcookie; 863 return sc->as_state; 864 } 865 866 void 867 agp_get_info(void *devcookie, struct agp_info *info) 868 { 869 struct agp_softc *sc = devcookie; 870 871 info->ai_mode = pci_conf_read(sc->as_pc, sc->as_tag, 872 sc->as_capoff + AGP_STATUS); 873 info->ai_aperture_base = sc->as_apaddr; 874 info->ai_aperture_size = sc->as_apsize; /* XXXfvdl inconsistent */ 875 info->ai_aperture_vaddr = bus_space_vaddr(sc->as_apt, sc->as_aph); 876 info->ai_memory_allowed = sc->as_maxmem; 877 info->ai_memory_used = sc->as_allocated; 878 } 879 880 int 881 agp_acquire(void *dev) 882 { 883 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL); 884 } 885 886 int 887 agp_release(void *dev) 888 { 889 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL); 890 } 891 892 int 893 agp_enable(void *dev, u_int32_t mode) 894 { 895 struct agp_softc *sc = dev; 896 897 return AGP_ENABLE(sc, mode); 898 } 899 900 void *agp_alloc_memory(void *dev, int type, vsize_t bytes) 901 { 902 struct agp_softc *sc = dev; 903 904 return (void *)AGP_ALLOC_MEMORY(sc, type, bytes); 905 } 906 907 void agp_free_memory(void *dev, void *handle) 908 { 909 struct agp_softc *sc = dev; 910 struct agp_memory *mem = (struct agp_memory *) handle; 911 AGP_FREE_MEMORY(sc, mem); 912 } 913 914 int agp_bind_memory(void *dev, void *handle, off_t offset) 915 { 916 struct agp_softc *sc = dev; 917 struct agp_memory *mem = (struct agp_memory *) handle; 918 919 return AGP_BIND_MEMORY(sc, mem, offset); 920 } 921 922 int agp_unbind_memory(void *dev, void *handle) 923 { 924 struct agp_softc *sc = dev; 925 struct agp_memory *mem = (struct agp_memory *) handle; 926 927 return AGP_UNBIND_MEMORY(sc, mem); 928 } 929 930 void agp_memory_info(void *dev, void *handle, struct agp_memory_info *mi) 931 { 932 struct agp_memory *mem = (struct agp_memory *) handle; 933 934 mi->ami_size = mem->am_size; 935 mi->ami_physical = mem->am_physical; 936 mi->ami_offset = mem->am_offset; 937 mi->ami_is_bound = mem->am_is_bound; 938 } 939 940 int 941 agp_alloc_dmamem(bus_dma_tag_t tag, size_t size, int flags, 942 bus_dmamap_t *mapp, caddr_t *vaddr, bus_addr_t *baddr, 943 bus_dma_segment_t *seg, int nseg, int *rseg) 944 945 { 946 int error, level = 0; 947 948 if ((error = bus_dmamem_alloc(tag, size, PAGE_SIZE, 0, 949 seg, nseg, rseg, BUS_DMA_NOWAIT)) != 0) 950 goto out; 951 level++; 952 953 if ((error = bus_dmamem_map(tag, seg, *rseg, size, vaddr, 954 BUS_DMA_NOWAIT | flags)) != 0) 955 goto out; 956 level++; 957 958 if ((error = bus_dmamap_create(tag, size, *rseg, size, 0, 959 BUS_DMA_NOWAIT, mapp)) != 0) 960 goto out; 961 level++; 962 963 if ((error = bus_dmamap_load(tag, *mapp, *vaddr, size, NULL, 964 BUS_DMA_NOWAIT)) != 0) 965 goto out; 966 967 *baddr = (*mapp)->dm_segs[0].ds_addr; 968 969 return 0; 970 out: 971 switch (level) { 972 case 3: 973 bus_dmamap_destroy(tag, *mapp); 974 /* FALLTHROUGH */ 975 case 2: 976 bus_dmamem_unmap(tag, *vaddr, size); 977 /* FALLTHROUGH */ 978 case 1: 979 bus_dmamem_free(tag, seg, *rseg); 980 break; 981 default: 982 break; 983 } 984 985 return error; 986 } 987 988 void 989 agp_free_dmamem(bus_dma_tag_t tag, size_t size, bus_dmamap_t map, 990 caddr_t vaddr, bus_dma_segment_t *seg, int nseg) 991 { 992 993 bus_dmamap_unload(tag, map); 994 bus_dmamap_destroy(tag, map); 995 bus_dmamem_unmap(tag, vaddr, size); 996 bus_dmamem_free(tag, seg, nseg); 997 } 998
Indexes created Mon Sep 22 05:09:51 GMT 2025